Vibrator for skips of concrete mixing machines



Oct. 24, 1939. G. B. ENGLEBY Y 2,176,893

VIBRATOR FOR SKIPS 0F CONCRETE MIXING MACHINES Filed April 25, 1939 2 Sheets-Sheet 1 Attorneys Oct. 24, 1939, I G. B. ENGLEBY 2,176,893

VIBRATOR FOR SKIPS OF CONCRETE MIXING MACHINES Filed April 25, 1959 2 Sheets-Sheet 2 Inventor A fiomeys Patented Oct. 24, 1939 UNITED STATES PATENT OFFICE VIBRATOR FOR SKIPS OF CONCRETE MIX- ING MACHINES 1 Claim.

This invention relates to means for vibrating the skips of concrete mixing machines while the skips are in position delivering material placed therein into the cylinder of the machine so as to prevent the material from sticking or remaining in the skip but caused to gravitate into the cylinder.

The general object of the invention is to provide simple means for yieldingly supporting the shaft of the skip and with a shaft driven from the motor of the mixer and having parts thereon engaging parts of the skip shaft for imparting movement to the skip shaft and the skip while the skip is in raised or delivery position, the parts of the two shafts being out of engagement with each other when the skip is in lowered position so that neither the skip nor its shaft will be actuated by the rotary shaft when the skip is in lowered position.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure 1 is a view looking toward one end of the concrete mixer with the skip raised and showing the invention in use.

Figure 2 is a section on the line 22 of Figure 1.

Figure 3 is a section on the line 33 of Figure 1.

Figure 4 is a section on the line 4-4 of Figure 3.

Figure 5 is a section on the line 5-5 of Figure 1.

Figure 6 is a View similar to Figure 5 but showing the parts in operated position.

In these drawings the letter A indicates the frame of the mixer and the letter B indicates the cylinder thereof while the skip is shown at S. In carrying out the invention the lower or discharge end of the skip is connected to a shaft I which has its ends journaled in blocks 2 slidably arranged in frame parts 3 of the machine. Bolts 5 are connected to the blocks and the bolts of each block pass through slots 6 formed in the frame as more particularly shown in Figure 3. A plate or block I is fastened in the frame below each block 2 and a spring 8 located between each block 2 and a stationary block 9 located above each block 2, tends to hold the block 2 against the block 1. A shaft I 0 is journaled in the frame part and is located under the shaft I and this shaft [0 is suitably driven from the motor M by the means shown generally at H in Figure 1. The shaft I0 carries the cams I2, each of which is formed with a substantially radial shoulder I2 with the circumference of the cam gradually increasing in diameter from the inner end of the shoulder to the outer end thereof. Shoes I3 are connected with the shaft I and these shoes are so arranged that when the skip is in lowered position, as shown in full lines in Figure 2 and also in Figure 5, these shoes are out of the path of the cams l2 so that neither the skip nor its shaft I will be moved by the shaft l0. However, when the skip is raised to the dotted line position shown in Figure 2 and also in Figure 6 the cams will engage the shoes and thus the shaft and the skip will be raised due to the raising of the blocks 2 against the action of the springs 8. The skip is subjected to a jolting motion which acts to dislodge any material sticking in the skip when the same is in raised position so that all of the material placed in the skip will discharge into the cylinder of the mixing machine.

As will be seen the shaft ID will be constantly rotated as long as the machine is in operation but the skip Will only be subjected to the jolting motion from the shaft II] when it is in raised position as the parts will be out of engagement when the skip is in lowered position and thus the shaft ID will have no efiect on the skip.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts provided that such changes fall within the scope of the appended claim.

Having described the claimed as new is:

In a concrete mixing machine including its skip and skip shaft, bearing means for the ends of the shaft, means for supporting the bearing means for limited vertical movement, spring means for normally holding the bearing means with the shaft in lowered position, a second shaft, means for rotating the same from the power means of the mixing machine, cams on the second shaft and shoes on the skip shaft which are moved into the path of the cams when the skip is raised to dumping position, whereby the skip and its shaft are vibrated in a vertical plane by engagement of the shoes with the cams, said shoes being out of engagement with said cams when the skip is in lowered or loading position.

invention, what is i; GEORGE B. ENGLEBY. 

